Manual of Clinical Microbiology

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Page 93IDENTIFICATION BY RECOGNITION OF THE COLONIES Typically, after 18 to 24
h of incubation on blood agar, the colonies of group A streptococci are about 0.5
mm in diameter, transparent or translucent, and domed; they have a smooth or ...

Page 117Identification Gonococcal colonies are best observed with the aid of a magnifying
glass or, preferably, a stereoscopic microscope. After 24 h of incubation, the colonies are approximately 0.5 to 1 mm in diameter and appear gray to white, ...

Page 341(If spreading colonies or molds appear, cut them out of the agar and discard.)
Look for tiny colonies with a characteristic domed, glistening, bisected pearl
appearance. Usually, tiny zones of hazy hemolysis surround the colonies, but this
is not ...